Big dams don’t just redraw maps — at extreme scale, they can nudge Earth’s rotation by a hair. Here’s what NASA-backed ...

Is Earth's rotation speeding up? Earth takes 24 hours to complete a full rotation in a standard day, equal to exactly 86,400 seconds.

Will the Earth spin faster July 22? Is July 22 the shortest day? Scientists anticipate that Earth's rotation will quicken enough to create three shorter days between July and August.

Scientists anticipate that Earth's rotation will quicken enough to create three shorter days between July and August, starting Wednesday, July 9.

Earth is the planet we have the best opportunity to understand in detail—helping us see how other rocky planets behave, even ...

NASA and ISRO have successfully deployed the world's largest radar antenna, a 33-foot structure, as part of the NISAR mission ...